From ab959d7b4194715870128e616b8e29d4a101e488 Mon Sep 17 00:00:00 2001 From: etobi Date: Tue, 3 Sep 2013 09:48:41 +0200 Subject: Imported Upstream version 1.1.1+rev1207 --- lib/libucsi/atsc/ac3_descriptor.h | 112 ++++++++++++++++++++++++++++++++++++++ 1 file changed, 112 insertions(+) create mode 100644 lib/libucsi/atsc/ac3_descriptor.h (limited to 'lib/libucsi/atsc/ac3_descriptor.h') diff --git a/lib/libucsi/atsc/ac3_descriptor.h b/lib/libucsi/atsc/ac3_descriptor.h new file mode 100644 index 0000000..489695b --- /dev/null +++ b/lib/libucsi/atsc/ac3_descriptor.h @@ -0,0 +1,112 @@ +/* + * section and descriptor parser + * + * Copyright (C) 2005 Kenneth Aafloy (kenneth@linuxtv.org) + * Copyright (C) 2005 Andrew de Quincey (adq_atsc@lidskialf.net) + * + * This library is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation; either + * version 2.1 of the License, or (at your option) any later version. + * + * This library is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with this library; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA + */ + +#ifndef _UCSI_ATSC_AC3_DESCRIPTOR +#define _UCSI_ATSC_AC3_DESCRIPTOR 1 + +#ifdef __cplusplus +extern "C" +{ +#endif + +#include +#include + +enum atsc_ac3_channels { + ATSC_AC3_CHANNELS_1_PLUS_1 = 0x0, + ATSC_AC3_CHANNELS_1_0 = 0x1, + ATSC_AC3_CHANNELS_2_0 = 0x2, + ATSC_AC3_CHANNELS_3_0 = 0x3, + ATSC_AC3_CHANNELS_2_1 = 0x4, + ATSC_AC3_CHANNELS_3_1 = 0x5, + ATSC_AC3_CHANNELS_2_2 = 0x6, + ATSC_AC3_CHANNELS_3_2 = 0x7, + ATSC_AC3_CHANNELS_1 = 0x8, + ATSC_AC3_CHANNELS_LTEQ_2 = 0x9, + ATSC_AC3_CHANNELS_LTEQ_3 = 0xa, + ATSC_AC3_CHANNELS_LTEQ_4 = 0xb, + ATSC_AC3_CHANNELS_LTEQ_5 = 0xc, + ATSC_AC3_CHANNELS_LTEQ_6 = 0xd, +}; + +/** + * atsc_ac3_descriptor structure. + */ +struct atsc_ac3_descriptor { + struct descriptor d; + + EBIT2(uint8_t sample_rate_code : 3; , + uint8_t bsid : 5; ); + EBIT2(uint8_t bit_rate_code : 6; , + uint8_t surround_mode : 2; ); + EBIT3(uint8_t bsmod : 3; , + uint8_t num_channels : 4; , + uint8_t full_svc : 1; ); + /* uint8_t additional_info[] */ +} __ucsi_packed; + +/** + * Process an atsc_ac3_descriptor. + * + * @param d Generic descriptor structure. + * @return atsc_ac3_descriptor pointer, or NULL on error. + */ +static inline struct atsc_ac3_descriptor* + atsc_ac3_descriptor_codec(struct descriptor* d) +{ + int pos = 0; + + if (d->len < (pos+4)) + return NULL; + pos += 4; + + return (struct atsc_ac3_descriptor*) d; +} + +/** + * Retrieve pointer to additional_info field of a atsc_ac3_descriptor. + * + * @param d atsc_ac3_descriptor pointer. + * @return Pointer to additional_info field. + */ +static inline uint8_t *atsc_ac3_descriptor_additional_info(struct atsc_ac3_descriptor *d) +{ + int pos = sizeof(struct atsc_ac3_descriptor); + + return ((uint8_t *) d) + pos; +} + +/** + * Determine length of additional_info field of a atsc_ac3_descriptor. + * + * @param d atsc_ac3_descriptor pointer. + * @return Length of field in bytes. + */ +static inline int atsc_ac3_descriptor_additional_info_length(struct atsc_ac3_descriptor* d) +{ + return d->d.len - 3; +} + +#ifdef __cplusplus +} +#endif + +#endif -- cgit v1.2.3